Dear all,
I find the sampling rate of USRP is surprisingly accurate.
Now I set the sampling rate as 4 MHz, and there are always exactly 4M points
between two pps signals.
Even if I take off the GPS antenna, the sampling rate is still very
accurate.
This means I only need the GPS antenna at t
Hi,
I'm trying to synchronize two N200s in phases with both of them having
GPSDO inside. I followedthe instructions on ettus for synchronizing channel
phase. However, I got error message as follows,
UHD source block got error code 0x2gr_block_executor: source produced no output. We're
This system used a 1PPS to sync the radios - for the sake of getting it up
and running quickly. A GPSDO would work just as well, with ~50 ns of
accuracy, which is pretty good.
Alternatively, as Josh said, you could synchronize the radios with other
methods, like over-the air broadcast of a "syste
Hi,
i construct very simple scheme Audio Source --> Wav Sink
gr generates non-null wav file
-rw-rw-r-- 1 anton anton 24M сент. 27 00:46 freq2.wav
but when i try to play it or fetch info about file with soxi (sox plugin)
i got nothing
aplay freq2.wav
Воспроизведение WAVE 'freq2.wav' : Signed 16 b
One should remember the extremes involved in syncing all USRP'S which will
lead to developing a new driver for USRP2.
What about the your APP development time?. Are you interested in developing
new driver or app ?
On Thu, Sep 27, 2012 at 12:04 AM, Matt Ettus wrote:
> You can use a gigabit ethe
On 09/26/2012 03:20 PM, Alex Zhang wrote:
> Hi Josh,
>
> A quick question, what is the time reference you are using for the TDMA
> engine? Is it GPS or something else? How accurate about the time
> synchronization?
In this case we tested in the LAB with shared reference and PPS. GPSDO
per USRP
Hi Josh,
A quick question, what is the time reference you are using for the TDMA
engine? Is it GPS or something else? How accurate about the time
synchronization?
On Wed, Sep 26, 2012 at 1:31 PM, Josh Blum wrote:
> Hey list,
>
> For those who were not at the GR Conference 2012: I presented some
On 09/26/2012 01:00 PM, Vincenzo Pellegrini wrote:
> Dear gr / USRP fellows,
>
> I'm currently experimenting with USRP B100 Local Oscillator relocation time.
> I've done some experiments on the RX path by tuning towards and away from
> an OFDM beacon signal.
>
> I have flushed into the received
On 09/26/2012 01:36 AM, LD Zhang wrote:
> Hi,
>
> I did try and made a GRC example of using a USRP Source and a fft sink,
> scope sink, and a file sink to test out the idea.
>
> When looking at the scope sink, the data is about +/- 2x10^-4. I changed
> the gain of the USRP source block to 20 dB
On 09/26/2012 01:52 AM, Bilal wrote:
> I m using USRP2,I have configured usrp2 and tested
> uhd_usrp_probe,uhd_siggen_gui and uhd_fft all works fine.
> Now i want to make my own program like uhd_fft but there is a problem that
> the terminal prompt returns right after i execute the program with
On 09/26/2012 12:47 AM, Jose Torres Diaz wrote:
> Hi,
>
> I've just finished my block that generates PSDUs and then, it transmits
> downstream subscribers using message passing mechanism. I am using as a
> sink "Extras: Blob to Socket", but when I run my flowgraph in GNU Radio
> Companion (after
You can use a gigabit ethernet switch and put all the USRPs on there.
You should be able to make USRPs send data to each other. You will of
course need to do work to get your algorithms into the FPGA.
Matt
On Wed, Sep 26, 2012 at 12:38 PM, Anisha Gorur wrote:
> I have a quick theoretical questi
Hey list,
For those who were not at the GR Conference 2012: I presented some work
demonstrating a simple ARQ MAC over TDMA; using GNU Radio and USRPs in
GRC. Its very cool work, I encourage anyone to take a peek at the
slides, and checkout the repo and run the examples.
The MAC layer work is actu
Dear gr / USRP fellows,
I'm currently experimenting with USRP B100 Local Oscillator relocation time.
I've done some experiments on the RX path by tuning towards and away from
an OFDM beacon signal.
I have flushed into the received signal some recognizable "relocation
marks" which allowed me to an
Clarification: This would be using USRP N210, not USRP1, where I know it is
possible to have an 8 channel receive or transmit only using a mimo cable.
On Wed, Sep 26, 2012 at 12:38 PM, Anisha Gorur wrote:
> I have a quick theoretical question. Is there any way to construct an
> 8-channel receive
I have a quick theoretical question. Is there any way to construct an
8-channel receiver using 4 USRPS without data going through the host
computer? Basically some kind of way to daisy chain mimo cables (though I
know this is not possible), or at least get the same benefits you would
receive from d
Iso image of Ubuntu+Gnuradio installed inside a vmware player ... is this
what you want ? Its easy and you can make by yourself :)
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Finally recorded it with my newly arrived SBX
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-- Forwarded message --
From: Adeel Anwar
Date: Wed, Sep 26, 2012 at 3:52 AM
Subject: Re: [Discuss-gnuradio] using general_work when output rate is not
fixed
To: "Rahman, Muhammad Mahboob Ur"
Mahboob,
uhd usrp sink. Now, the other issue is, when I send pre-recorded GMSK
sample
hi everyone.tell me how to get the bootable cd of gnuradio .is there available
or not.please reply me sooner___
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